The air in my town is so polluted that people ____ to wear masks. Will we ____ live with smog in fifty years' time? Katy and Jack's mum said they ____ leave for the party if they didn't clean their rooms. My sister has a new boyfriend. I ____ meet him. He's fine. You ____ bring the first aid kit. We ____ hunt whales because they're an endangered species.

must, have to, don't have to, mustn't (Julek)


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